Easytrak is an Ultra Short Baseline (USBL) underwater
positioning and tracking system centred on a multi-
element, single transducer that transmits and receives
acoustic signals to dynamic subsea targets, from which
range, bearing and depth information can be determined.

Developed to meet the ever increasing demands for a
highly efficient location device which is truly portable,
straightforward to use and extremely stable, Easytrak
offers a multitude of benefits for a wide range of marine
positioning applications which include diver, ROV, AUV
and towfish tracking, instrumentation positioning and
release.

Easytrak has rapidly developed a sound reputation for
use in commercial, military and environmental research
situations where both accuracy and versatility are
stipulated.

Key Features

2650 Easytrak Portable
Easytrak Portable consists of a yellow marine-grade splash proof console containing all the electronics for the USBL
system including receive amplifiers, transmitter, digital signal processing and navigation computer and display. A built in
power supply allows operation away from an AC power supply for 3 to 4 hours.

The user interface consists of a number of illuminated keys on the panel, plus on-screen information from the bright TFT
display.Transmit and receive LED’s are further visual confirmation. Audio monitoring of signals is also available via an
integral loudspeaker or headphone jack. Serial connectors allow the integration of a GPS receiver, external motion sensors,
gyrocompass and a data-out port for use with navigation packages. Also included are an Ethernet port, allowing a remote
user PC to display the tracking data, plus a USB mouse port.

The TFT display consists of two parts; an auto-scaling Position Display and an area for data to be read and entered, the
Text Panel. The Position Display can be shown with polar or rectangular scaling with colour coded targets to indicate signal
strength. Operation is menu-driven and operates on a Windows CE platform with default settings pre-programmed.

2661 Easytrak Lite
Easytrak Lite incorporates all of the features of the Easytrak Portable system, but has been designed for a more permanent
installation in a vessel’s Operations Room or dry laboratory. The main transmit and receive electronics power supply and
digital signal processing (DSP) hardware are all fitted within a 2U rackmount enclosure for connection to a laptop or
desktop PC. Connection is by serial cable (via supplied usb adapter), with the system software provided on CD. The
operational performance is identical to the Portable unit, the only additional requirement being a suitable PC with a 1.2 GHz
processor running Windows XP. This configuration eliminates the need for the integral keyboard and display screen,
thereby reducing the system cost to the end user.

Easytrak Transducers
The ETM902C is a rugged transducer designed for deployment from moon-pool, gate valve or over the side of a
vessel.Designed to be specifically small and relatively heavy, the transducer is ideal when deployed on a cable. At just
100mm in diameter, each unit uses multiple receive transducer elements and one transmit element along with receive
amplifiers.This innovative design configuration allows accurate range and bearing calculations, both at depth and along a
horizontal path.

The ETM902C transducer has a built-in pitch and roll sensor to compensate for vessel movement as well as a magnetic
compass for heading calculations. It also has transducer calibration information stored inside, so that on connection
Easytrak, either the Portable or the Lite, can upload the calibration parameters of the transducer to ensure optimal accuracy
in minimum time.